The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 2017
Filed:
Jul. 24, 2013
Mitsubishi Electric Corporation, Tokyo, JP;
Rena Nishitani, Tokyo, JP;
Nami Nakano, Tokyo, JP;
Tomohiro Sasagawa, Tokyo, JP;
Nobutaka Kobayashi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A planar light source deviceincludes a light sourceand a reflection member. The light sourceemits a light beamhaving directivity. The reflection memberhas a box shape including a single bottom-plate part, side-plate partsandconnected to the bottom-plate part, and an opening partfacing the bottom-plate part. The box shape has inner surfaces which are reflection surfaces. The bottom-plate parthas a quadrilateral shape including two facing short sides and two facing long sides. The light beamenters an inside of the box shape of the reflection memberthrough a side of the side-plate partconnected to the short side of the bottom-plate part, travels in a direction of the long side of the bottom-plate partwhile being reflected at the side-plate partsandconnected to the long sides of the bottom-plate part, and is emitted through the opening part. The reflection surfaces of the side-plate partsandconnected to the long sides of the bottom-plate partinclude regions at which the light beamis specularly reflected and regions at which the light beamis diffused and reflected.